Numerical simulations and experimental verification of the feasibility are shown to improve B1 uniformity of a commercial 19F RF coil with addition of a secondary resonator using inductive coupling without changing the RF coil at 7.0T animal MRI. The designed resonator was placed on the opposite side of the imaging object from the 19F surface coil to improve the field uniformity. Numerical simulations and related experiments using a 19F phantom show significant improvement of |B1+| and image uniformity, i.e., about 26%. The mouse leg image of 19F/1H with the designed resonator is shown as an example of potential pre-clinical applications.
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